A Search for B -> tau nu Recoiling Against B- -> D0 l- nu X
The authors present a search for the decay B{sup +} {yields} {ell}{sup +}{nu}{sub {ell}} ({ell} = {tau}, {mu}, or e) in (458.9 {+-} 5.1) x 10{sup 6} B{bar B} pairs recorded with the BABAR detector at the PEP-II B-Factory. They search for these B decays in a sample of B{sup +}B{sup -} events where one B-meson is reconstructed as B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}X. Using the method of Feldman and Cousins, they obtain {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) = (1.7 {+-} 0.8 {+-} 0.2) x 10{sup -4}, which excludes zero at 2.3{sigma}. They interpret the central value in the context of the Standard Model and find the B meson decay constant to be f{sub B}{sup 2} = (62 {+-} 31) x 10{sup 3} MeV{sup 2}. They find no evidence for B{sup +} {yields} e{sup +}{nu}{sub e} and B{sup +} {yields} {mu}{sup +}{nu}{sub {mu}} and set upper limits at the 90% C.L. {Beta}(B{sup +} {yields} e{sup +}{nu}{sub e}) < 0.8 x 10{sup -5} and {Beta}(B{sup +} {yields} {mu}{sup +}{nu}{sub {mu}}) < 1.1 x 10{sup -5}.
- Research Organization:
- Stanford Linear Accelerator Center (SLAC)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 969222
- Report Number(s):
- SLAC-PUB-13866; arXiv:0912.2453
- Journal Information:
- Submitted to Physical Review D, Journal Name: Submitted to Physical Review D
- Country of Publication:
- United States
- Language:
- English
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